你好，工程师，我最近在用AD7173-8芯片遇到一些问题。问题是这样的，我用单片机和AD7173-8通讯可以读到ID，但是断电重开后就读不到了，然后我换了一个芯片，第一次上电可以读到，但是断电重开就读不到了。AVDD1  AVDD2  IOVDD都是3.3V供电，我的单片机SPI通讯信号高电平是5V。通讯的过程中IOVDD引脚的电压是4.2V，请问是原因造成的。

请问AD7173-8的模拟地AVSS和数字地DGND芯片内部是连通共地的吗？

In my internship we are currently planning on using the AD7173-8 in a multiple channel high speed application. Using the evaluation board the speed of the device gets slowed by 128us when using multiple channels. Are there any sollutions for this problem…

I'm intending to use the AD7173-8 in a design and have several unused pins which I'm wondering how to handle. The pins are as follows below. Please advise. 

GPIO0

GPIO1

GPIO2

GPIO3

ERROR

AIN0/REF2-

Hi, Everyone.

I've seen AD7193(8ch) supports all type of RTD,TC.

However I need more channel as like AD7173-8 or AD7175-8.

Do they support all type of RTD,TC as well as AD7193?

In the AD7173-8 ADC, the default gain value is said to depend on the IC type. In the datasheet, the value is mentioned as 

Reset: 0x5XXXX0. But I couldn't find the exact value in the datasheet anywhere.

Thanks for any help

Hi everyone, I am trying to use AD7173-8 in an application where 3 channels are to be used and I am a little confused about that.

In particular:

• The AD7173-8 is connected to a microcontroller via SPI. I have configured SPI according to the datasheet…

在调试AD7173-8的时候，首先发送了读IP寄存器的命令，收到的回复是30D5，也即SPI通信无误。然后将CS拉低，DIN保持高电平，但是一直等不到DOUT为低电平的状态。看datasheet上说明，默认为连续转换模式，在一次数据转换完成后在CS为低电平时DOUT变为低电平，然后可以发送命令0x44读取数据，但是我都没见到DOUT有低电平的时候，请问各位专家如何解决？

我如何不管DOUT是否为低，直接发送0x44命令，读到的数据是个固定值。

各位大牛：

我们在用AD7173-8做电压采样时，发现，输入ADC管脚电压为5mv, ADC采样值为0

请教各大牛：AD7173能最低识别的采样输入是多少呢？5mv都不能正常采样吗？

谢谢